London 2012 will enable local landlords in east London to charge sky-high rents during the Olympic period. Photograph: Anthony Charlton - Locog Handout/EPA

A four-bedroom house at £8,000 a week? A two-bedroom maisonette for £20,000 a month? For many owners of property within a hop, skip and jump of the Olympic sites, summer 2012 means one thing only: big money.

Aware that during next July and August they could make more money in weeks than they normally would in months, homeowners are making plans to live elsewhere and rent out their property to tourists or big companies which need to be near the Games.

But anyone renting a local flat or house during the Olympics should know that their mega-payments may have been responsible for effectively evicting the usual tenants. Estate agents in Stratford, east London, say an increasing number of landlords are asking for clauses to be written into new rental contracts allowing them to kick out their tenants for a convenient "holiday let" during the Games.

Mohsin Kothia, of Filtons, said his agents promoted this possibility "because effectively the agent will make double money".

The prospect of being unceremoniously booted out of their homes is making many Stratford tenants nervous. Arthur Cegilski, a Polish house-husband with two young children, said many of his friends had been told by their landlords to move out. "A while ago my landlord asked me to go on holiday in August 2012. I said: 'Of course, if you pay!'

"He hasn't mentioned it again but I'm worried that I'm going to get notice."